Hi all. I've recently started shooting headshots in natural light: partial shade or all shade. They generally come out OK, but recently, I shot a client with whiter than white skin he came out looking like Caspar the Friendly Ghost. I also noticed that in general, my images look a little flat. Can anyone recommend some tips or camera settings that I might use to enhance? I'm using a Canon Digital Rebel XT and have a Vivitar 530FD flash unit with diffuser, as well as a gold, silver, and white reflectors. I'm sort of a bare bones operation and don't have access to a studio on weekends when I do most of my freelance work. Thanks in advance for your help!